报告人：孙宇宸 (图尔库大学)

题目：On divisor bounded multiplicative functions in short intervals

摘要：In 2016, the celebrated Matomaki--Radziwi\l\l theorem showed that there are cancellations for 1-bounded multiplicative functions in almost all short intervals. Our recent work proved that Matomaki--Radziwi\l\l theorem can be extended to divisor bounded multiplicative functions. Especially, we proved that for any sufficiently large $X$, $\epsilon>0$ and $h \geq (\log X)^{(1+\epsilon)k \log k- k +1}$, we have

$$\frac{1}{h} \sum_{x<n \leq x+h}d_k(n) - \frac{1}{x} \sum_{x<n \leq 2x}d_k(n) = o(\log^{k-1}x)$$

for almost all $x \in [X,2X]$, where $d_k(n) = \sum_{m_1 \cdots m_k = n} 1$.

时间：2023-08-08 09:40-10:30

地点：明德楼C702